Author: Roberto Waldteufel
Date: 11:39:11 09/27/98
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On September 27, 1998 at 09:36:12, Jari Huikari wrote: >On September 24, 1998 at 06:19:18, Roberto Waldteufel wrote: > >>Searching captures first is indeed very beneficial for alpha-beta efficiency, >>but I think that just about all other programs also do this, as it is well >>known. By the way, you should include promotions as well, whenever there is >>one available, as these too cause a big change in material. > >(I) >What about advancing white pawn to seventh (black pawn to second) rank? >Should also be examined early? I have not tried this in my move ordering, but it might help to include these after the captures and promotions. I know that some programs include these moves in the quiescence search, which seems like a good idea, but then you must examine all replies (as if it were a checking move) to see if the pawn can promote. > >(II) >HOW MANY killer-candidates your programs store? (To be tried if they cause >a cutoff.) > I only store one move per position, but others use two or more. >(III) >I added random feature to Nero 4. (Explained in the end of its FAQ-file.) >Makes randomly one of the legal moves. Can OCCASIONALLY beat KASPAROV... :-) I may be misunderstanding you, but if it plays random moves, I doubt if it would even beat a weak player, and certainly not Kasparov - I would need to see the game to be convinced! I think this is the way some programs work on "easy" levels, ie deliberately playing some random (usually weak) moves to give the opponent a better chance of winning, but I would not recommend it for a serious game. But perhaps by "random" you mean a random choice from several equally good moves, or from an opening book move-list? Best wishes, Roberto > >Latest version of Nero http://www.math.jyu.fi/~huikari/NERO4.ZIP > > Jari
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